FILTRON 
Free In and Out 
Field Intelligence Officer 
Figure it out 
Foreign Intelligence Office 
Foreign Intelligence Officer 
Free In/Out 
Furnished and installed by Others 
Federacion Internacional de Oleicultur… 
Firmware Interface Object 
Florida Institute of Oceanography 
Food Investigation Organization 
Football Intelligence Officer 
For Information Only 
Force Integration Office 
Forestry Industry Organization 
Freedom of Information Act 
French Information Office 
Frequency Input/Output 
Foreign Investment Office